Ohineangaanga Stream Ecological Assessment Prepared for David Marshall 27 May 2022 - Western Bay of Plenty District Council
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Ohineangaanga Stream
Ecological Assessment
Prepared for David Marshall
27 May 2022
Document Quality Assurance
Bibliographic reference for citation:
Boffa Miskell Limited 2022. Ohineangaanga Stream: Ecological Assessment. Report
prepared by Boffa Miskell Limited for David Marshall.
Prepared by: Dr Sharon De Luca
Partner /Ecologist
Boffa Miskell Limited
Reviewed by: Dr Tanya Blakely
Senior Principal / Ecologist
Boffa Miskell Limited
Status: FINAL Revision / version: 3 Issue date: 27 May 2022
Use and Reliance
This report has been prepared by Boffa Miskell Limited on the specific instructions of our Client. It is solely for our Client’s use for
the purpose for which it is intended in accordance with the agreed scope of work. Boffa Miskell does not accept any liability or
responsibility in relation to the use of this report contrary to the above, or to any person other than the Client. Any use or reliance
by a third party is at that party's own risk. Where information has been supplied by the Client or obtained from other external
sources, it has been assumed that it is accurate, without independent verification, unless otherwise indicated. No liability or
responsibility is accepted by Boffa Miskell Limited for any errors or omissions to the extent that they arise from inaccurate
information provided by the Client or any external source.
Template revision: 20170727 0000
File ref: BM220154_Ohineangaanga_Stream_Eco_asmt_18052022.docx
Cover photograph: Ohineangaanga Stream, © BML, 2022
CONTENTS
1.0 Introduction 1
1.1 Background and scope 1
1.2 Site description 1
1.3 Literature Review 2
1.4 Proposed Structure Plan 94 3
1.5 Proposed Stormwater Treatment 3
1.6 BOPRC Submission 4
2.0 Methods 5
3.0 Results 6
3.1 Stream morphology 6
3.2 Water and sediment quality 9
3.3 Macroinvertebrate community 12
3.4 Fish survey 13
4.0 Summary of ecological values 13
5.0 References 15
Appendices
Appendix 1: Survey Sites for BML 2018 Assessment
Appendix 2: Survey Sites 2022
Appendix 3: BOPRC Submission relating to Stormwater Management
and Mitigation
Appendix 4: Water quality and sediment quality laboratory transcripts
Appendix 5: Macroinvertebrate results
U:\2022\BM220154_SdL_Ohineangaanga_Stream_Assessment_for_submission\Documents\BM220154_Ohi
neangaanga_Stream_Eco_asmt_27052022.docx
Ohineangaanga Stream
Ecological Assessment
Prepared for David Marshall
27 May 2022
Document Quality Assurance
Bibliographic reference for citation:
Boffa Miskell Limited 2022. Ohineangaanga Stream: Ecological Assessment. Report
prepared by Boffa Miskell Limited for David Marshall.
Prepared by: Dr Sharon De Luca
Partner /Ecologist
Boffa Miskell Limited
Reviewed by: Dr Tanya Blakely
Senior Principal / Ecologist
Boffa Miskell Limited
Status: FINAL Revision / version: 3 Issue date: 27 May 2022
Use and Reliance
This report has been prepared by Boffa Miskell Limited on the specific instructions of our Client. It is solely for our Client’s use for
the purpose for which it is intended in accordance with the agreed scope of work. Boffa Miskell does not accept any liability or
responsibility in relation to the use of this report contrary to the above, or to any person other than the Client. Any use or reliance
by a third party is at that party's own risk. Where information has been supplied by the Client or obtained from other external
sources, it has been assumed that it is accurate, without independent verification, unless otherwise indicated. No liability or
responsibility is accepted by Boffa Miskell Limited for any errors or omissions to the extent that they arise from inaccurate
information provided by the Client or any external source.
Template revision: 20170727 0000
File ref: BM220154_Ohineangaanga_Stream_Eco_asmt_18052022.docx
Cover photograph: Ohineangaanga Stream, © BML, 2022
CONTENTS
1.0 Introduction 1
1.1 Background and scope 1
1.2 Site description 1
1.3 Literature Review 2
1.4 Proposed Structure Plan 94 3
1.5 Proposed Stormwater Treatment 3
1.6 BOPRC Submission 4
2.0 Methods 5
3.0 Results 6
3.1 Stream morphology 6
3.2 Water and sediment quality 9
3.3 Macroinvertebrate community 12
3.4 Fish survey 13
4.0 Summary of ecological values 13
5.0 References 15
Appendices
Appendix 1: Survey Sites for BML 2018 Assessment
Appendix 2: Survey Sites 2022
Appendix 3: BOPRC Submission relating to Stormwater Management
and Mitigation
Appendix 4: Water quality and sediment quality laboratory transcripts
Appendix 5: Macroinvertebrate results
U:\2022\BM220154_SdL_Ohineangaanga_Stream_Assessment_for_submission\Documents\BM220154_Ohi
neangaanga_Stream_Eco_asmt_27052022.docx
1.0 Introduction
1.1 Background and scope
Boffa Miskell Ltd (BML) undertook an ecological assessment along the Ohineangaanga Stream,
Te Puke adjacent to proposed Structure Plan (Washer Road, District Plan Change 94) (Figure
1), to identify the values within the waterway. The purpose of this report is to describe and
assess existing ecological values along Ohineangaanga Stream adjacent to the proposed
Structure Plan Change 94 and interpret the ecological effects of the proposed plan change with
respect to stream water quality and stream ecology.
Figure 1: Proposed structure plan site
1.2 Site description
Ohineangaanga Stream is located in the Western Bay of Plenty region. The headwaters of the
stream begin approximately 10km south west of Te Puke township within an area of mixed land
use including agriculture, pine plantation and native forest. The main stem of the stream flows
north towards Te Puke along a natural flow path with native vegetation dominant in the riparian
margin. The stream continues to flow north, first through horticultural land use, then through the
Te Puke town centre, before following a mostly straightened channel through agricultural land
and discharging into Raparapahoe Canal.
The site is low lying and prone to flooding. However, flooding is not considered a significant
constraint for development of the site given the existing site elevation and location adjacent to a
large flood plain (section 3.0 LCL Engineering Services Report).
Boffa Miskell Ltd | Ohineangaanga Stream | Ecological Assessment | 27 May 2022 1
1.3 Literature Review
1.3.1 Bay of Plenty Regional Council, 2016
Bay of Plenty Regional Council (BOPRC) undertook a freshwater fish survey throughout
waterways in the Kaituna-Maketū and Pongakawa-Waitahanui Water Management Area (WMA)
in May 2016 to fill knowledge gaps identified in early work by BOPRC. The survey involved
electric-fishing in shallow, hard-bottom stream, whereas fyke nets were deployed in deep, slow-
flowing streams or streams with fine benthic sediment.
The BOPRC survey of Ohineangaanga revealed the presence of shortjaw kokopu (Galaxias
postvectis) (Threatened – Nationally Vulnerable (Dunn et al., 2018)) not previously identified in
this stream and not detected in subsequent fish surveys. Additional freshwater fish species
detected included shortfin eel (Anguilla australis) (Not Threatened) and longfin eel (Anguilla
dieffenbachii) (At Risk – Declining (Dunn et al., 2018)), galaxias species and redfin bully
(Gobiomorphus huttoni) (Not Threatened).
1.3.2 Boffa Miskell Ltd, 2018
The upper and middle reaches of the stream (beyond the Structure Plan project site) has high
quality ecological values with intact habitats and a healthy functioning ecosystem (Boffa Miskell
Ltd, 2018). The 2018 assessment classified the Ohineangaanga Stream as being of national
importance based on the stream meeting at least four criteria of the Bay of Plenty Regional
Policy Statement’s Criteria for assessing matters of national importance in the Bay of Plenty
region (Set 3) (Momentum Planning and Design, 2021).
The BML 2018 survey indicated that nutrient levels were high across all three sampling sites,
with the highest concentrations recorded at the most downstream site. The downstream site
also had high turbidity levels and total suspended solids. Macroinvertebrate indices were
indicative of fair water and/or habitat quality and probable moderate pollution (although the
upstream QMCI score suggested poor water and/or habitat quality and probable severe
pollution). The interpretation of these macroinvertebrate scores was that they were likely
reflective of the high nutrient levels found within the stream.
The 2018 BML survey indicated fish diversity was greatest at the downstream sampling site (8
species detected), with only longfin eel recorded from the midstream and upstream sampling
sites 1. Freshwater fish database records also show there is a diverse range of fish species
present within the Ohineangaanga Stream, including At Risk and Threatened species.
The Ohineangaanga Stream, as a whole, was recorded (BML, 2018) as having high ecological
values due to:
• The high-quality habitat in the upper and middle reaches of the stream with intact habitats
and a healthy functioning ecosystem;
1
The upstream, midstream and downstream sites surveyed in 2018 are distant from the project sites surveyed and are
shown in Appendix 1.
2 Boffa Miskell Ltd | Ohineangaanga Stream | Ecological Assessment | 27 May 2022
• The assemblage of native fish species present within the waterway, including At Risk and
Threatened species;
• The natural state of the stream in the upper and middle reaches; and
• The waterway and forested riparian margins provide an important ecological linkage for
freshwater and terrestrial native fauna.
1.3.3 Freshwater Fish Database
There are over 20 records for this stream in the freshwater fish database 2. Fish species
recorded, which were not found during the current 2022 fish surveys (nor during the 2018 BML
nor 2016 BOPRC fish surveys), included grey mullet (Mugil cephalus), common bully
(Gobiomorphus cotidianus) and torrentfish (Cheimarrichthys fosteri).
1.4 Proposed Structure Plan 94
The proposal is to for a plan change to rezone approximately 7.012ha of land at 66 Washer
Road, Te Puke from Rural to Industrial to establish the Washer Road Business Park (Figure 1).
This comprises a wedge shape piece of pastural land, bordered by Washer Road and the East
Pack industrial buildings to the east, and Ohineangaanga Stream along the western boundary.
To the north of the proposed structure plan site is more pastural land. To the south-east is
existing residential properties, separated from the site by the Ohineangaanga Stream and a
proposed 10 m minimum vegetation buffer, which will be implemented for the length of the
eastern boundary as part of the plan change. The site narrows to a point on to Washer
Road/Station Rd. Access from Washer Rd is flat, however the site falls steeply into the
Ohineangaanga Stream along the eastern boundary (summarised from the application for plan
change, (Momentum 2021).
1.5 Proposed Stormwater Treatment
Lysaght Consulting propose treating stormwater generated onsite by way of an extended
detention pond, treatment wetland, swales and raingardens (Figure 2).
Currently, the runoff from the proposed Plan Change area (pastoral land use) disperses evenly
across the site to the eastern part of the site to the Ohineangaanga Stream.
2
https://nzffdms.niwa.co.nz
Boffa Miskell Ltd | Ohineangaanga Stream | Ecological Assessment | 27 May 2022 3
Figure 2: Excerpt from Lysaght Consulting Report (Lysaght Consultants Ltd, 2021) regarding stormwater
1.6 BOPRC Submission
The submissions received from BOPRC relating to Stormwater Management and Stormwater
Mitigation are copied in Appendix 1. BOPRC opposes Plan Change 94 on the basis of not
giving effect to the relevant provisions of the National Policy Statement Freshwater (NPS-FM)
and the relevant provisions of the Bay of Plenty Regional Natural Resources Plan (RNRP) to
manage the incremental degradation of water quality on receiving environments arising from
urban stormwater.
4 Boffa Miskell Ltd | Ohineangaanga Stream | Ecological Assessment | 27 May 2022BOPRC seeks that methods to ensure a treatment approach to water sensitive urban design is
required and the methods to ensure proposed treatment devices are located outside of the flood
plain.
National Policy Statement Freshwater
3.21 Definitions relating to wetlands and rivers
Loss of value, in relation to a natural inland wetland or river, means the wetland or river is less
able to provide for the following existing or potential values: (a) any value identified for it under
the National Objectives Framework (NOF) process; or (b) any of the following, whether or not
they are identified under the NOF process: (i) ecosystem health (ii) indigenous biodiversity (iii)
hydrological functioning (iv) Māori freshwater values (v) amenity.
Policy IM P1A Regional Natural Resources Plan (RNRP)
The loss of river extent and values is avoided, unless the council is satisfied: (a) that there is a
functional need for the activity in that location; and (b) the effects of the activity are managed by
applying the effects management hierarchy. For the purposes of this policy, effects
management hierarchy and loss of value have the meaning given by the National Policy
Statement for Freshwater Management 2020.
2.0 Methods
We conducted fieldwork on the 18th and 19th of March 2022. Weather conditions during the
fieldwork were generally clear with minimal cloud cover and wind and no rain in the preceding
three days.
Aquatic ecological values were assessed at three locations along the Ohineangaanga Stream.
Figure 1 (Appendix 2) shows the locations of the three sampling sites. The assessment included
recording riparian vegetation, waterway channel morphology and habitat diversity, sampling
macroinvertebrates and fish assemblages, collecting spot water quality measurements, water
quality samples and sediment samples for laboratory analyses. Habitat values were assessed
following the methods described in (Harding et al., 2009) were modified to suit the current
assessment.
Spot water quality measurements (dissolved oxygen, temperature, pH, conductivity) were taken
using a calibrated YSI ProPlus multiparameter. Water and sediment quality samples were
collected, kept chilled and sent to Hill Laboratories for analysis of nutrient, heavy metal
concentrations and total suspended solids.
Macroinvertebrate samples were collected from each site using a 500-micron net following
Protocol C2 for the downstream site (Ministry for the Environment 2001), preserved in ethanol
and analysed according to Protocol P3: full count. Soft-bottom indices were calculated for the
three sites (Stark & Maxted 2007) as well as species richness and number of EPT 3 taxa.
The fish survey involved setting three unbaited fyke nets and six unbaited Gee minnow traps at
each of the three sites and recording any fish species observed during the site visit. Nets were
set during the afternoon and retrieved the following morning. All native fish caught were
identified, measured, and released, while pest fish were euthanized humanely. The fishing
3
Ephemeroptera (mayflies), Plecoptera (stoneflies) and Trichoptera (caddisflies) taxa.
Boffa Miskell Ltd | Ohineangaanga Stream | Ecological Assessment | 27 May 2022 5survey was based on modified methodology outlined in Joy et al. 2013 and considered to be
adequate to provide an overview of the fish species present within the waterways.
The fish survey was supplemented with records from the freshwater fish database, a previous
survey in 2017 for Bay of Plenty Regional Council (Boffa Miskell Ltd, 2018) as well as a
previous fish survey conducted by Bay of Plenty Regional Council (Bay of Plenty Regional
Council, 2016).
3.0 Results
3.1 Stream morphology
3.1.1 Upstream site
The sampling site is located in an area predominantly reserve (Donovan Park). Stream width
varies over the assessed reach from approximately 1 m to 5 m, following a predominantly
natural but straightened flow path. The stream consists of optimal fish and macroinvertebrate
habitat with an array of habitats (i.e. woody debris, riffles and gravel/sand benthic sediment) and
a mixture of hydrologic conditions (i.e. riffles, runs and pools of varying size).
The substrate consists of bedrock in faster flowing areas, as well as large cobbles, ranging in
size. Depths vary over the assessed stream reach between 0.2 m to 0.5 m.
Riparian vegetation is largely dominated by exotic species (Table 1), with some flax (Phormium
tenax) present. Sparse rooted emergent and rare rooted submergent macrophytes were
evident. Images 1 and 2 show the upstream sampling reach.
6 Boffa Miskell Ltd | Ohineangaanga Stream | Ecological Assessment | 27 May 2022Image 1: Upstream sampling site. Image 2: Upstream sampling site with exotic riparian
vegetation.
Table 1: Riparian vegetation species
Native vegetation Species name Upstream Midstream Downstream
Cabbage tree Cordyline australis
Wetland cutty grass Carex geminata
Harekeke Phormium tenax
Isolepis lenticularis
Exotic vegetation Species name Upstream Midstream Downstream
Castor oil plant Ricinus communis
Purple top verbain Verbena bonariensis,
Jerusalem artichoke Helianthus tuerosus
Convulvulus - bindweed Convululus sp.
Blackberry Rubus fruticosus
Artemism verlotiorum Artemism verlotiorum
Pampas Cortaderia sp.
Willow weed Persicaria maculosa
Rank grass
Woolly nightshade Solanum mauritianum
Wild ginger Hedychium gardnerianum
Gorse Ulex europaeus
Water cress Nasturtium officinale
Wattle Acacia dealbata
Boffa Miskell Ltd | Ohineangaanga Stream | Ecological Assessment | 27 May 2022 7Black nightshade Solanum Nigrum
Grey willow Salix cinerea
Nasturtium Nasturtium sp.
Buttercup Ranunculus repens
Daucus carrot Daucus carota
Oak Quercus
Wandering Jew Tradescantia sp.
Maple Acer sp.
Lotus Lotus sp.
3.1.2 Midstream site
The midstream sampling site was located approximately midway adjacent to the proposed
industrial area/structure plan area. The sampling site is located in an area with predominantly
agricultural land use. Stream width varies over the assessed reach between approximately 0.5
m to 1 m and follows a straightened alignment. The stream consists of a wide variety of aquatic
habitat types including woody debris, riffles, undercut banks, sand/gravel benthic sediment and
a variety of hydrologic conditions.
Riparian vegetation is dominated by exotic vegetation (Table 1), with no indigenous species.
Sparse rooted emergent and rare rooted submergent macrophytes are present within the
sampling site. Images 3 and 4 show the midstream sampling reach.
Image 3: Midstream sampling site with stream reach Image 2: Midstream sampling site with stream reach
surrounded by steep banks and exotic vegetation. surrounded by steep banks and exotic vegetation.
8 Boffa Miskell Ltd | Ohineangaanga Stream | Ecological Assessment | 27 May 20223.1.3 Downstream site
The downstream sampling site was located adjacent to the upstream extent of the proposed
industrial area/structure plan area. Similar to the two sampling sites further upstream, this
sampling site is located in an area with predominantly agricultural land use.
Stream width is mostly uniform over the assessed reach (around 1-2 m) and follows a
straightened channel path. Habitat consists of some undercut banks with over-hanging
vegetation. Hydrologic conditions are uniform, with no pools or riffle habitat present and
unvarying depth and velocity. The substrate consists of sand and gravel sediment along the
entire assessed stream reach.
Riparian vegetation is minimal, consisting predominantly of rank pasture grasses, low stature
exotic weeds and occasional indigenous species (cabbage tree, Carex geminata and Isolepis
sp.) (Table 1). Images 5 and 6 show the stream reach.
Image 5: Downstream site showing exotic riparian Image 6: Downstream sampling site with straightened
vegetation. stream channel through agricultural land use.
3.2 Water and sediment quality
A summary of the water quality results, both spot water quality parameters and analysed water
samples, are presented in Table 2. Results are compared against ANZG, which provide
guidelines provide standards for chronic exposure of aquatic organisms to contaminants.
Laboratory transcripts are provided in Appendix 2.
Spot water quality parameters across the three sampling sites showed neutral pH levels as well
as mostly high dissolved oxygen levels. Temperature and dissolved oxygen are likely to
fluctuate daily and with seasons.
Boffa Miskell Ltd | Ohineangaanga Stream | Ecological Assessment | 27 May 2022 9Total suspended solids were very low at all three sites. Water quality sample results indicated
below laboratory detection limits for all heavy metals apart from zinc, which was detected but at
very low concentrations. Ammoniacal nitrogen, nitrate and dissolved reactive phosphorus
(DRP) in stream water were above ANZG DGV values at the downstream site (cells highlighted
orange in Table 2). Nitrate and nitrogen were also above ANZG DGV values (cells highlighted
orange in Table 2) at the upstream and midstream sites. Instream sediment samples revealed
very low concentrations of heavy metals and petroleum hydrocarbons across all three sites
(Table 2).
These results indicate high water and sediment quality at the three sites within Ohineangaanga
Stream adjacent to the industrial/structure plan site. Elevated nitrate and nitrogen in stream
water may encourage the growth of periphyton and macroalgae, but excessive growth was not
evident in the field survey.
10 Boffa Miskell Ltd | Ohineangaanga Stream | Ecological Assessment | 27 May 2022Table 2: Water and sediment quality results
Parameters Units Upstream Midstream Downstream ANZG (2018)
Water
Field measurements
Temperature ⁰C 15.2 14.7 13.7 -
Dissolved oxygen % 100.5 106.3 6.8 92 - 103 4
pH pH units 6.66 6.72 6.8 7.26 - 7.7 5
Laboratory results
Total suspended g/mCopper mg/kg
3.4 Fish survey
Fish survey results are provided in the table below (Table 3). Sampling sites are displayed on
Figure 1 (Appendix 1).
Table 3: Fish species recorded from 2022 survey
Number (size range in mm)
Fish species
Up-stream Mid-stream Down-stream
Longfin eel 5 2
Anguilla dieffenbachii (600, 300, 500, 350,
400) (500, 800)
Shortfin eel 4
Anguilla australis
(350, 350, 600, 400)
Inanga 4 2
Galaxias maculatus
(30,40, 50, 50) (60, 50
Smelt 2
Retropinna retropinna
(60,40, plus 13 dead)
Redfin bully 1 1
Gobiomorphus huttoni
(70) (50)
Bully sp. 3 1
Gobiomorphus sp.
(20, 20,15) (20)
Common bully 1
Gobiomorphus cotidianas (50)
A total of sevennative fish species were recorded across the three sampling sites. Of the six
species, two species have a conservation status of At risk (declining) including longfin eel and
inanga (Dunn et al., 2018). Longfin eel were found at upstream and downstream sites in 2022,
while inanga were found at the midstream and downstream sites.
Fish diversity was greatest at the downstream sampling site, with only longfin eel recorded from
the midstream and upstream sampling sites. Fish location data can be related to the migratory
nature of native fish species found and habitat connectivity (which can be interrupted by
physical and chemical barriers).
4.0 Summary of ecological values
The lower reaches of the Ohineangaanga Stream adjacent to the proposed industrial/structure
plan area follows a straightened channel through pastoral farmland with moderate quality
habitat for instream fauna and reduced hydrologic heterogeneity.
Some nutrients were elevated above DGV across the three sampling sites. Macroinvertebrate
indices were indicative of fair water and/or habitat quality and probable moderate pollution
(although the upstream QMCI score suggested poor water and/or habitat quality and probable
Boffa Miskell Ltd | Ohineangaanga Stream | Ecological Assessment | 27 May 2022 13severe pollution). The MCI and QMCI scores are likely reflective of the elevated nutrient levels
and habitat conditions (highly mobile substrates and absence of instream cover in parts) found
within the stream. Heavy metals and TPH concentrations were low in water and sediment at all
sites.
Fish diversity was greatest at the downstream sampling site, with only longfin eel recorded from
the midstream and upstream sampling sites. Fish records show there is a diverse range of fish
species present within the Ohineangaanga Stream including At Risk and Threatened species.
Overall, the entire length of the Ohineangaanga Stream has generally high ecological values
due to:
• The high-quality habitat in the upper and middle reaches of the stream (upstream of the
industrial/structure plan area) with intact habitats and a healthy functioning ecosystem;
• The assemblage of native fish species present within the waterway, including At Risk and
Threatened species;
• The natural state of the stream in the upper and middle reaches upstream of the
industrial/structure plan area; and
In addition, the whole stream is assessed as being of national importance in the Bay of Plenty
region as it meets at least four criteria of the Bay of Plenty Regional Policy Statement’s Criteria
for assessing matters of national importance in the Bay of Plenty region (Set 3) (Bay of Plenty
Regional Council 2014).
The Ohineangaanaga Stream adjacent to the proposed Structure Plan area has moderate to
high ecological values (based on water and sediment quality, macroinvertebrate assemblages,
and fish communities present). Stormwater collected on site will need to be treated to a high
standard prior to discharge to the Ohineangaanga Stream to protect the ecological values.
5.0 Recommendations
In response to the moderate to high ecological values present adjacent to the proposed
structure plan area, we have recommended additional stormwater treatment over and above the
standard approach. The following stormwater treatment has been developed by Lysaght
Consultants in response to the recommendations based on ecological values and also reflects
BOPRC submission requests.
5.1 Revised Stormwater Treatment Approach
The following revised stormwater treatment is now proposed, which provides for enhanced
stormwater treatment prior to discharge to the Ohineangaanga Stream.
• All roof, cladding, gutters, downpipes and external plant and fixtures on buildings to be
colourbond/non-leach materials to ensure dissolved metals are minimised.
• All high pollution activities (e.g. wreckers, galvanising etc) shall have site specific plans
and treatment systems and operate under cover to minimise runoff of pollutants into
the reticulated system.
14 Boffa Miskell Ltd | Ohineangaanga Stream | Ecological Assessment | 27 May 2022• Stormwater shall be collected from all hardstand areas and reticulated to trunk
drainage mains and directed to the stormwater treatment system.
• The water quality flow shall be directed through a gross pollutant trap (e.g.
VortCapture) for removal the bulk of pollutants/sediments > 5mm in size. The system
will also remove free-floating grease and oil and litter. This pre-filter system will
provide significant reductions in maintenance costs and extend the periods between
maintenance of the downstream treatment devices.
• Water quality flows will then be directed through a finer mechanical filtration system
e.g. Jellyfish or Stormfilter) for removal of particles down to 2 microns, which will
remove a high percentage of particle bound pollutants, including phosphorus,
nitrogen, metals and hydrocarbons.
• Finally, the stormwater will be directed through a planted wetland or other approved
biological/chemical device to provide polishing, particularly for the removal of
nutrients in plant uptake and aerobic/anaerobic processes.
• The stormwater would discharge from the wetland directly into the stream via a pipe,
swale or spillway.
• Higher flows up to and including the extended detention flowrate will bypass the gross
pollutant trap into the wetland where it will be stored and detained, releasing slowly
over 24 hours into the stream to reduce velocity erosion of the stream.
• Flows in excess of the treatment and extended detention flows will surcharge the
bypass system and be directed as a combination of piped and overland flow (over the
road and in swales) to the stream.
6.0 Conclusions on BOPRC Submission
BOPRC seek for the industrial/structure plan area that a stormwater treatment approach to
water sensitive urban design is required and the methods to ensure proposed treatment devices
are located outside of the flood plain. This is provided for in the revised stormwater treatment
detailed in section 5.1 above.
7.0 References
Bay of Plenty Regional Council 2016. Fisheries assessment of waterways throughout the
Kaituna-Maketu & Pongakawa-Waitahanui WMA. Report prepared for Bay of Plenty Regional
Council.
Bay of Plenty Regional Council 2014. Bay of Plenty Regional Policy Statement. Report
prepared for Bay of Plenty Regional Council.
Boothroyd IG, Stark JD 2000. Use of invertebrates in monitoring. Chapter 14 in Collier KJ and
Winterbourn MJ eds. New Zealand stream invertebrates: ecology and implications for
management. New Zealand Limnological Society, Christchurch. Pp. 334-373.
Boffa Miskell Ltd | Ohineangaanga Stream | Ecological Assessment | 27 May 2022 15Boffa Miskell Ltd. (2018). Ohineangaanga Stream ecological assessment (Report No. T17167).
Prepared by Boffa Miskell Ltd for Bay of Plenty Regional Council.
Dunn, N. R., Allibone, R. M., Closs, G. P., Crow, S. K., David, B. O., Goodman, J. M., Griffiths,
M., Jack, D. C., Ling, N., Waters, J. M., & Rolfe, J. R. (2018). Conservation status of New
Zealand freshwater fishes, 2017 (New Zealand Threat Classification Series No. 24).
Department of Conservation.
Goodman JM, Dunn ND, Ravenscroft PJ, Allibone RM, Boubee JAT, David BO, Griffiths M, Ling
N, Hitchmough RA, Rolfe JR 2014. Conservation status of New Zealand freshwater fish, 2013.
Report prepared for the Department of Conservation.
Harding, J. S., Clapcott, J., Quinn, J., Hayes, J. W., Joy, M. K., Storey, R. G., Greig, H., Hay, J.,
James, T., Beech, M., Ozane, R., Meredith, A., & Boothroyd, I. (2009). Stream habitat:
Assessment protocols for wadeable rivers and streams of New Zealand. School of Biological
Sciences, University of Canterbury.
Joy M, David B, Lake M 2013. New Zealand freshwater fish sampling protocols. Massey
University. Palmerston North, New Zealand.
Lysaght Consultants Ltd. (2021). Propose private plan change engineering servicing report: 66
Washer Road, Te Puke. Prepared by Lysaght Consultants Ltd for David Marshall.
Ministry for the Environment 2001. Protocols for sampling macroinvertebrates in wadeable
streams. New Zealand Macroinvertebrate Working Group Report No. 1. Prepared for the
Ministry for the Environment. Sustainable Management Fund Project No. 5103.
Momentum Planning and Design. (2021). Application for plan change: Washer Road business
park. Prepared by Momentum Planning and Design for David Marshall.
Stark J.D., Maxted J.R. 2007. A biotic index for New Zealand’s soft-bottomed streams. New
Zealand Journal of Marine and Freshwater Research. Vol. 41: 43-61.
16 Boffa Miskell Ltd | Ohineangaanga Stream | Ecological Assessment | 27 May 2022Appendix 1: Survey Sites for BML 2018
Assessment
Appendix 1: Survey Sites for BML 2018 Assessment
Boffa Miskell Ltd | Ohineangaanga Stream | Ecological AssessmentFile Ref: T17167_SurveySiteLocationMap.mxd
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This plan has been prepared by Boffa Miskell Limited on the 0 1,400 m
Ohineangaanga Stream Assessment
,
%
Legend
specific instructions of our Client. It is solely for our Clients use
in accordance with the agreed scope of work. Any use or BML Fish Survey Site
reliance by a third party is at that partys own risk. Where
information has been supplied by the Client or obtained from
1:70,000 @ A3
"
) BOPRC Fish Survey Site Ohineangaanga Stream Survey Site Locations
other external sources, it has been assumed that it is accurate. Figure 1
No liability or responsibility is accepted by Boffa Miskell
Limited for any errors or omissions to the extent that they
arise from inaccurate information provided by the Client or
Data Sources: Land Infomration New Zealand, Crown
Copyright Reserved. BOPLASS Limited.
!
( BOPRC Water Quality Survey Site Date: 7 March 2018 | Revision: 0
Plan prepared by Boffa Miskell Limited
www.boffamiskell.co.nz
any external source.
Projection: NZGD 2000 New Zealand Transverse Mercator
Ohineangaanga Stream and Tributaries Project Manager: Kieran.Miller@boffamiskell.co.nz | Drawn: JWa | Checked: KMiAppendix 2: Survey Sites 2022 Appendix 2: Survey Sites 2022 Boffa Miskell Ltd | Ohineangaanga Stream | [Subject]
File Ref: BM220154.mxd
Eagle Technology, LINZ, StatsNZ, NIWA, Natural Earth, © OpenStreetMap contributors., Eagle Technology, Land Information New Zealand
This plan has been prepared by Boffa Miskell Limited on the 0 200 m
specific instructions of our Client. It is solely for our Clients OHINEANGAANGA STREAM ASSESSMENT
use in accordance with the agreed scope of work. Any use or BML Survey Site 2022
reliance by a third party is at that partys own risk. Where
information has been supplied by the Client or obtained from
other external sources, it has been assumed that it is
1:10,000 @ A3
BML Survey Site 2017
Ohineangaanga Stream Survey Site Locations
accurate. No liability or responsibility is accepted by Boffa
Miskell Limited for any errors or omissions to the extent that
they arise from inaccurate information provided by the Client
Data Sources: Land Information New Zealand, Crown BOPRC Fish Survey Site Date: 29 March 2022 | Revision: 0
or any external source. Copyright Reserved. BOPLASS Limited. Plan prepared by Boffa Miskell Limited
Ohineangaanga Stream
www.boffamiskell.co.nz Projection: NZGD 2000 New Zealand Transverse Mercator Project Manager: Sharon.DeLuca@boffamiskell.co.nz | Drawn: JWa | Checked: SDeAppendix 3: BOPRC Submission relating to
Stormwater Management and Mitigation
Appendix 3: BOPRC Submission relating to Stormwater Management and Mitigation
Boffa Miskell Ltd | Ohineangaanga Stream | Ecological AssessmentAppendix 3: BOPRC Submission relating to Stormwater Management and Mitigation Boffa Miskell Ltd | Ohineangaanga Stream | [Subject]
Appendix 4: Water quality and sediment quality
laboratory transcripts
Appendix 4: Water quality and sediment quality laboratory transcripts
Boffa Miskell Ltd | Ohineangaanga Stream | Ecological AssessmentR J Hill Laboratories Limited T 0508 HILL LAB (44 555 22)
28 Duke Street Frankton 3204 T +64 7 858 2000
Private Bag 3205 E mail@hill-labs.co.nz
Hamilton 3240 New Zealand W www.hill-laboratories.com
Certificate of Analysis Page 1 of 3
Client: Boffa Miskell Limited Lab No: 2925832 SPv1
Contact: S De Luca Date Received: 22-Mar-2022
C/- Boffa Miskell Limited Date Reported: 29-Mar-2022
PO Box 13373 Quote No: 116862
Tauranga 3141 Order No: BM220154
Client Reference: BM220154
Submitted By: S De Luca
Sample Type: Sediment
Sample Name: US (sediment) MS (sediment) DS (sediment)
17-Mar-2022 1:15 17-Mar-2022 17-Mar-2022
pm 12:00 pm 10:15 am
Lab Number: 2925832.4 2925832.5 2925832.6
Individual Tests
Dry Matter g/100g as rcvd 74 76 72 - -
Heavy metals screen level As,Cd,Cr,Cu,Ni,Pb,Zn
Total Recoverable Arsenic mg/kg dry wtSummary of Methods
The following table(s) gives a brief description of the methods used to conduct the analyses for this job. The detection limits given below are those attainable in a relatively simple matrix.
Detection limits may be higher for individual samples should insufficient sample be available, or if the matrix requires that dilutions be performed during analysis. A detection limit range
indicates the lowest and highest detection limits in the associated suite of analytes. A full listing of compounds and detection limits are available from the laboratory upon request.
Unless otherwise indicated, analyses were performed at Hill Laboratories, 28 Duke Street, Frankton, Hamilton 3204.
Sample Type: Sediment
Test Method Description Default Detection Limit Sample No
Individual Tests
Environmental Solids Sample Drying* Air dried at 35°C - 4-6
Used for sample preparation.
May contain a residual moisture content of 2-5%.
Environmental Solids Sample Air dried at 35°C and sieved,These samples were collected by yourselves (or your agent) and analysed as received at the laboratory. Testing was completed between 23-Mar-2022 and 29-Mar-2022. For completion dates of individual analyses please contact the laboratory. Samples are held at the laboratory after reporting for a length of time based on the stability of the samples and analytes being tested (considering any preservation used), and the storage space available. Once the storage period is completed, the samples are discarded unless otherwise agreed with the customer. Extended storage times may incur additional charges. This certificate of analysis must not be reproduced, except in full, without the written consent of the signatory. Ara Heron BSc (Tech) Client Services Manager - Environmental Lab No: 2925832-SPv1 Hill Laboratories Page 3 of 3
Appendix 5: Macroinvertebrate results Appendix 5: Macroinvertebrate results Boffa Miskell Ltd | Ohineangaanga Stream | [Subject]
Ohineangaan Ohineangaan Ohineangaan Ohineangaan Ohineangaan Ohineangaan Ohineangaan Ohineangaan Ohineangaan
ga Stream ga Stream ga Stream ga Stream ga Stream ga Stream ga Stream ga Stream ga Stream
March 2022 March 2022 March 2022 March 2022 March 2022 March 2022 March 2022 March 2022 March 2022
Group Species DS1-3 1 DS1-3 2 DS1-3 3 MS1-3 1 MS1-3 2 MS1-3 3 US1-3 1 US1-3 2 US1-3 3
1 Total 201 225 120 240 203 204 257 219 206
2 Number of 12 19 9 9 8 13 21 22 19
3 Number of 0 3 0 0 0 1 4 5 3
4 MCI score 79.2 96.5 74.2 82.2 74 73.8 77.5 84.9 71.6
5 QMCI 3.1 3.5 3 3.5 3.4 3.5 2.9 3.5 2.9
6 Full
count=1,Cod 4 4 4 2 2 2 2 2 2
ACARINA ACARINA 2 1 5 8 3
ANNELIDA HIRUDINEA 1
ANNELIDA OLIGOCHAET 31 86 43 144 118 88 81 28 77
CNIDARIA Hydra 4 3 2
Coleoptera Elmidae 4 5 3 4 1 2 1
Coleoptera Hydrophilida 1 2 1
COLLEMBOLA COLLEMBOL 4 1 4
CRUSTACEA Cladocera 9 3 2
CRUSTACEA Copepoda 1 8 4 2
CRUSTACEA Isopoda, excl. 1
CRUSTACEA Ostracoda 1 1 13 7 3
Diptera Austrosimuli 1 1 2
Diptera Chironomida 3
Diptera Chironomus 11 26 8 4 3 10 9
Diptera Corynoneura 4
Diptera Eriopterini, 1
Diptera Mischoderus 1
Diptera Muscidae 1 2
Diptera Orthocladiina 53 13 6 30 34 56 5 3 2
Diptera Paradixa 13 2
Diptera Polypedilum 3 6
Diptera Tanypodinae 9 10 3 5 3 13 5 8 1
Diptera Tanytarsini 6 1 10 3
EphemeropterZephlebia 1 6
Hemiptera Microvelia 3
MOLLUSCA Gundlachia = 1
MOLLUSCA Lymnaeidae 1
MOLLUSCA Potamopyrgu 81 62 55 41 37 28 53 39 39
MOLLUSCA Sphaeriidae 1 1 1
NEMATODA NEMATODA 1 1 1 3 1NEMATOMOR NEMATOMO 23
NEMERTEA NEMERTEA 1 4 7 6 5 6 18 39
PLATYHELMI
PLATYHELMIN NTHES, excl. 1
Plecoptera Zelandiobius 1
Trichoptera Hydrobiosis 1
Trichoptera Hydropsyche- 1
Trichoptera Oxyethira 26 48 15
Trichoptera Pycnocentria 2
Trichoptera Pycnocentro 1
Trichoptera Triplectides 1 1 3 3
Trichoptera Zelandoptila 1 1You can also read
